Effects of weed management strategy on weed dynamics and its repercussion on productivity of Indian mustard

Abstract

 A field experiment was conducted during rabi season of 2022-23, at Banda University of Agriculture and Technology,
 Banda, Uttar Pradesh to study the efficacy of herbicides on weed dynamics and productivity of Indian mustard [Brassica
 juncea (L.) Czern & Coss]. Experiment was laid out in Randomized Block Design with eight treatments and replicated four
 times. Experimental crop of mustard was infested with several weeds viz. Cyperus rotundus, Cynodon dactylon, Anagalis
 arvensis, Chenopodium album, Dacaus carota,Rumex crispus.All the cultural and herbicidal treatments effectively
 reduced the dry weight of weeds by 60.8-61.5 % compared to the weedy check. Weed control efficiency at 75 DAS were
 in the range of  36.9 to 61.5 per cent. Yield loss due to weeds recorded 24.1%, when weeds remain unmanaged in field. The
 highest seed yield 1.84t ha-1obtained under weed-free conditions. Among herbicides, Pendimethalin 30 EC 1000g a.i. ha
1 PE fb (Propaquizafop 5% + oxyflourfen 12% w/w EC (ready-mix) @ 875g a.i. ha-1  PoE, recorded significantly higher seed
 yield of 1.7 t ha-1 and net returns of Rs.73604 ha-1. The dose of propaquizafop 5% + oxyflourfen 12% w/w EC (ready-mix)
 @ 875g a.i. ha-1 post emergence application had phytotoxic effect on crop.